Reading some manuals this is my understanding: • QUCS-S is supported by the IHP PDK, not QUCS. • Says here (first screenshot) that QUCS-S supports only 2-port sp simulation. Not multi port. And not exporting touchstone files. • I thought QUCS-S was just an interface for other simulators, like Xyce. And Xyce is also explicitly supported by IHP-SH13H2… Because in the Xyce manual (second screenshot), it says the simulator supports multi port sp simulation. Can someone clarify my misunderstanding please?